// This file contains material supporting section 3.7 of the textbook:
// "Object Oriented Software Engineering" and is issued under the open-source
// license found at www.lloseng.com

package edu.utwente.sem.hrs;

import ocsf.client.*;
import java.io.*;

/**
 * This class overrides some of the methods defined in the abstract superclass
 * in order to give more functionality to the client.
 * 
 * @author Dr Timothy C. Lethbridge
 * @author Dr Robert Lagani&egrave;
 * @author Fran&ccedil;ois B&eacute;langer
 * @version July 2000
 */
public class BalieClient extends AbstractClient
{
  /**
   * The interface type variable. It allows the implementation of the display
   * method in the client.
   */
  ChatIF clientUI;

  /**
   * Constructs an instance of the chat client.
   * 
   * @param host
   *          The server to connect to.
   * @param port
   *          The port number to connect on.
   * @param clientUI
   *          The interface type variable.
   */

  public BalieClient(String host, int port, ChatIF clientUI) throws IOException
  {
    super(host, port); //Call the superclass constructor
    this.clientUI = clientUI;
    openConnection();
  }

  /**
   * This method handles all data that comes in from the server.
   * 
   * @param msg
   *          The message from the server.
   */
  public void handleMessageFromServer(Object msg)
  {
    clientUI.display(msg.toString());
  }

  /**
   * This method handles all data coming from the UI
   * 
   * @param message
   *          The message from the UI.
   */
  public void handleMessageFromClientUI(String message)
  {
    try
    {
      sendToServer(message);
    }
    catch (IOException e)
    {
      clientUI
          .display("Could not send message to server.  Terminating client.");
      quit();
    }
  }

  /**
   * This method terminates the client.
   */
  public void quit()
  {
    try
    {
      closeConnection();
    }
    catch (IOException e)
    {
    }
    System.exit(0);
  }

  /**
   * Hook method called after the connection with the server has been closed by
   * this client. The default implementation does nothing. The method may be
   * overriden by subclasses to perform special processing such as cleaning up
   * and terminating, or attempting to reconnect.
   */
  protected void connectionClosed()
  {
    clientUI.display("quiting");

  }

  /**
   * Hook method called each time an exception is thrown by the client's thread
   * that is waiting for messages from the server. The method may be overridden
   * by subclasses.
   * 
   * @param exception
   *          the exception raised.
   */
  protected void connectionException(Exception exception)
  {
    clientUI.display("OHNOES, server shut down, now i will do same");
    quit();

  }

}
